Playback Issues - Audio/Video & Power

Help with audio & video playback issues, TV display type recognition & compatibility, HDCP messages, troubleshooting playback errors, advertisements, and resolving power issues.
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Level 7

Double-Flashing White Light & Sound Issues Roku Ultra

This issue began a week or two ago, at least that is when I noticed it. Video plays fine on all channels, but the white light is frequently flashing.

About once a day, sometimes more and sometimes less, we experience sound issues. Sometimes the sound is off from the video by a second, more or less. Sometimes the sound is just completely garbled. Again, this happens across all channels. If I reboot the device, it fixes the sound problem every time. The sound and flashing light do not consistently occur together and could be completely unrelated to each other.

This is a Roku Ultra Model 4660X, Software Version 9.0.0:4142
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